Digestive
Medicines for Constipation in children
A very common problem in children of hard, infrequent or difficult stools — usually not serious and treatable, though it can become a stubborn cycle needing consistent management.
Education and reference only. This explains which medicines are used and why, in plain language — it deliberately contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician, and check the BNF and the product labelling for prescribing detail.
Quick answer
What is Constipation in children?
Constipation is very common in children and means passing stools that are hard, infrequent, large, or painful and difficult to pass. It can start for various reasons — a change in diet or routine, not drinking enough, a painful or frightening experience passing stool, toilet training, or illness — and often becomes a self-reinforcing cycle: passing a hard stool hurts, so the child holds on to avoid the pain, which makes the stool harder and larger, making the next one more painful.
- How it is treated: Treatment usually works well but needs consistency and patience.
- Self-care: A balanced diet with enough fibre and fluids, encouraging regular, relaxed toilet sitting (such as after meals), a positive unpressured approach, rewards for trying, and continuing prescribed laxatives for as long as advised (not stopping too soon) all help.
- When to seek help: See a GP or health visitor about a child with hard, infrequent or painful stools, soiling, or tummy pain, for advice and treatment.
What it is
Constipation is very common in children and means passing stools that are hard, infrequent, large, or painful and difficult to pass. It can start for various reasons — a change in diet or routine, not drinking enough, a painful or frightening experience passing stool, toilet training, or illness — and often becomes a self-reinforcing cycle: passing a hard stool hurts, so the child holds on to avoid the pain, which makes the stool harder and larger, making the next one more painful. Signs include infrequent or hard stools, tummy pain, straining, holding-on behaviours (such as crossing the legs or hiding), reduced appetite, and, importantly, sometimes soiling — where soft or liquid stool leaks around a hard blockage, which can be mistaken for diarrhoea and is not the child's fault. It is usually not due to a serious underlying condition, and it is very treatable, though it can take persistence.
How it is treated
Treatment usually works well but needs consistency and patience. If there is a hard build-up of stool (impaction), the first step is to clear it, typically with laxative medicines prescribed at the right dose, which are safe and effective. After that, ongoing (maintenance) laxative treatment is often continued for some time to keep the stools soft and comfortable and to break the holding-on cycle — stopping too soon commonly leads to it coming back. Alongside medicines, measures help: a balanced diet with enough fibre and fluids, encouraging regular, relaxed toilet sitting (for example after meals), a positive and unpressured approach to the toilet, and rewards for effort rather than results. Soiling improves as the constipation is treated. Any red-flag features or failure to respond prompt further assessment. Support and reassurance for the family are important, as it can be stressful. Most children do very well with consistent treatment.
For this condition, these medicines
Medicine classes used for Constipation in children
Each links to a full, dose-free guide — what it is, how it works, who can and cannot use it, side effects, interactions and FAQs.
Beyond medication
Lifestyle and self-care
A balanced diet with enough fibre and fluids, encouraging regular, relaxed toilet sitting (such as after meals), a positive unpressured approach, rewards for trying, and continuing prescribed laxatives for as long as advised (not stopping too soon) all help.
When to get help
When to see a doctor
See a GP or health visitor about a child with hard, infrequent or painful stools, soiling, or tummy pain, for advice and treatment. Seek assessment for constipation from very early infancy, with significant weight loss, blood, or other worrying features.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
Answers
Constipation in children: frequently asked questions
Why does my child soil themselves if they are constipated?
When hard stool builds up, softer or liquid stool can leak around it, causing soiling that may look like diarrhoea. It is a sign of constipation, not deliberate, and improves as the constipation is treated. It is not the child's fault.
Are laxatives safe for children?
Yes — laxatives prescribed for childhood constipation are safe and effective when used as directed, and are often needed for a while to keep stools soft and break the cycle. Stopping too soon commonly leads to the constipation returning.
Sources
Where this is drawn from
- NICE CG99 — Constipation in children
- NHS — Constipation in children
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